?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+PENAMBAHAN+MAGNESIUM+OKSIDA+(0%2C+20%2C+25%2C+30%25)%0D%0ATERHADAP+KARAKTERISTIK+KEKERASAN+DAN+STRUKTUR+FASA%0D%0ABAHAN+KERAMIK+CORDIERITE+BERBASIS+SILIKA+SEKAM+PADI&rft.creator=FRANSISKA+MEILYANA%2C++(1217041054)&rft.subject=+&rft.subject=QC+Physics&rft.description=ABSTRAK%0D%0A%0D%0ATelah+dilakukan+sintesis+dan+karakterisasi+cordierite+berbasis+silika+sekam+padi%0D%0Adengan+penambahan+magnesium+oksida+sebanyak+0%2C+20%2C+25+dan+30%25+(C0%2C+C20%2C+C25%2C%0D%0Adan+C30).+Pembuatan+cordierite+menggunakan+bahan+MgO+dan+Al2O3+murni+dan%0D%0Asilika+dari+sekam+padi+yang+diekstraksi+dengan+metode+sol-gel+menggunakan%0D%0Alarutan+NaOH+1%2C5%25+dan+HNO3+10%25.+Metode+yang+digunakan+adalah+metode%0D%0Areaksi+padatan+(Solid+State+Reaction)+dan+disintering+pada+suhu+1250%C2%B0C+dengan%0D%0Awaktu+tahan+selama+3+jam.+Pengujian+fisis+yang+dilakukan+meliputi+penyusutan%2C%0D%0Adensitas+dan+porositas%2C+sedangkan+analisis+karakteristik+struktur+fasa+menggunakan%0D%0AXRD+(X-Ray+Diffraction)+serta+uji+kekerasan+menggunakan+microhardness+tester%0D%0Adengan+metode+Vickers.+Hasil+uji+struktur+menunjukkan+pada+C0+terbentuk+fasa%0D%0Acordierite+dan+spinel%2C+sedangkan+C20%2C+C25%2C+dan+C30+terbentuk+spinel%2C+forsterite%2C+dan%0D%0Apericlase.+Uji+kekerasan+menunjukkan+seiring+dengan+penambahan+MgO%0D%0Akekerasan+menurun+karena+menurunnya+densitas+dan+naiknya+porositas+pada+tiap%0D%0Asampel.%0D%0AKata+kunci+%3A+cordierite%2C+MgO%2C+silika+sekam+padi%2C+reaksi+solid+state.%0D%0A%0D%0AABSTRACT%0D%0ASynthesis+and+characterization+of+cordierite-based+rice+husk+silica+was+done+by%0D%0Aadding+magnesium+oxide+as+much+as+0%2C+20%2C+25%2C+and+30%25+(C0%2C+C20%2C+C25%2C+and+C30).%0D%0AThe+cordierite+was+made+of+pure+MgO+and+Al2O3+and+the+rice+husk+silica+which%0D%0Awas+extracted+by+using+sol-gel+method+using+NaOH+1%2C5%25+and+HNO3+10+%25%0D%0Asolution.+The+solid+state+reaction+is+used%2C+and+sample+was+sintered+at+1250+oC+with%0D%0Aholding+time+for+3+hours.+Physical+test+included+shrinkage%2C+density%2C+and+porosity%2C%0D%0Awhile+characteristic+analysis+of+phase+structure+was+determined+with+XRD+and%0D%0Ahardness+test+used+microhardness+tester+with+Vickers+method.+The+result+of%0D%0Astructure+test+showed+that+cordierite+and+spinel+phase+were+formed+on+C0%2C%0D%0Ameanwhile+forsterite%2C+spinel%2C+and+periclase+were+formed+on+C20%2C+C25%2C+and+C30.%0D%0AHardness+test+showed+that+along+with+the+increase+of+the+amount+of+MgO%2C+the%0D%0Ahardness+level+decrease+because+of+the+decrease+of+density+level+and+the+increase%0D%0Aof+porosity+in+each+sample.%0D%0AKey+words%3A+cordierite%2C+MgO%2C+rice+husk+silica%2C+solid+state+reaction.%0D%0A&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2016-10-18&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F24315%2F1%2FABSTRAK%2520%2528ABSTRACT%2529.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F24315%2F19%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F24315%2F20%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++FRANSISKA+MEILYANA%2C+(1217041054)++(2016)+PENGARUH+PENAMBAHAN+MAGNESIUM+OKSIDA+(0%2C+20%2C+25%2C+30%25)+TERHADAP+KARAKTERISTIK+KEKERASAN+DAN+STRUKTUR+FASA+BAHAN+KERAMIK+CORDIERITE+BERBASIS+SILIKA+SEKAM+PADI.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F24315%2F